<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8"> 
    <title>Bootstrap 实例 - 默认的面板</title>
	<link rel="stylesheet" href="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css">
	<script src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script>
	<script src="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
    <div class="well well-lg">
            Well 是一种会引起内容凹陷显示或插图效果的容器
    </div>
    <div class="well">
            Well 是一种会引起内容凹陷显示或插图效果的容器
    </div>
    <div class=" well well-sm">
            Well 是一种会引起内容凹陷显示或插图效果的容器
    </div>
</body>
</html>